HH LIFA Light is a performance base layer, delivering lightweight insulation and comfort for everyday use and high performance activities. HH LIFA light constructed with 100% Lifa fiber is quick-dry, very breathable and super lightweight. Continually perfected over the last 40 years, Lifa Stay Warm technology is the unique ingredient of all Helly Hansen base layers. Features of Helly Hansen HH Lifa 3/4 Boot Top Pant - Men's 100% Lifa 3/4 length construction for optimal fit to alpine boots Flat lock seams for max comfort Natural stretch fabric 125g/m2 fabric Non smoking home , send offers , lmk if you have questions